A 28-year-old suspected of playing a role in the bombings over the last three days in New York and New Jersey is being sought by law enforcement. Sources told NBC News officials are concerned an active terrorist cell with multiple players could be at work.
Sources told NBC that Ahmad Rahami of Elizabeth, New Jersey was the man seen on surveillance video in New York's Chelsea neighborhood on Saturday night when a blast wounded 29 people. Another device, which did not explode, was found nearby.
Authorities stopped a "vehicle of interest" in the New York blast last night near the Verrazano-Narrows Bridge in New York, the FBI said. Five people were being questioned.
New York City has tightened security, as heads of state arrive for the United Nations general assembly this week. New York Gov. Andrew Cuomo ordered 1,000 state troopers and National Guard troops to the city.
The naming of the suspect came hours after a backpack, appearing to contain pipe bombs, exploded near an Elizabeth rain station, as a police robot was examining it. The devices looked similar to one that exploded Saturday morning in Seaside Park, New Jersey.
Meanwhile, a man who stabbed nine people at a mall in central Minnesota before being shot dead was a "soldier of the Islamic State," the militant group's news agency said on Sunday. The attacker made references to Allah.
The FBI is investigating Minnesota attack as a potential act of terrorism. The Minnesota rampage on Saturday was on the same night at the Chelsea bombing in New York City.